With the tenth anniversary of 9/11 just a month away, the intelligence failures leading up to the terrorist attacks on the World Trade Center and the Pentagon have started to attract fresh scrutiny from former counterterrorism officials, who have called into question the veracity of the various government probes that concluded who knew what and when.

Indeed, an exclusive report recently published by Truthout based on documents obtained under the Freedom of Information Act and an interview with a former high-ranking counterterrorism official showed how a little-known military intelligence unit, unbeknownst to the various investigative bodies probing the terrorist attacks, was ordered by senior government officials to stop tracking Osama bin Laden and al-Qaeda’s movements prior to 9/11.

And now, in a stunning new interview scheduled to air on a local PBS affiliate in Colorado tonight, former counterterrorism czar Richard Clarke, for the first time, levels explosive allegations against three former top CIA officials – George Tenet, Cofer Black and Richard Blee – accusing them of knowingly withholding intelligence from the Bush and Clinton White House, the FBI, Immigration and the State and Defense Departments about two of the 9/11 hijackers who had entered the United States more than a year before the attacks.

Clarke also accused the former CIA officials of engaging in a cover-up failing to disclose to Congress and the 9/11 Commission key details about the two hijackers.